Machine for bending the eyes of elliptic-spring plates



(No Model.)

J. S. PESS-ENGER.

MAGHINE F03 BENDING THE EYES OP ELLIPTIG SPRING PLATES. No. 285,922. Patented. Oct. 2, 1888'.

o 76 Fi i O l i l V p g 7@ INVENTOR ATTORNEY JOHN s. PESSENGER, or BROOKLYN, NEW YORK, ASSIGNOR TO w. 'r'.

or STAMFORD,

MACHINE FOR SENDING THE EYES F ELLIPTIC-SPRlNG PLATES.

MINOR, CONNECTICUT.

SPECIFICATION forming part of Letters Patent No. 285,922, dated October 2, 1883.

(X0 model.)

To all whom, it may concern Be it known that 1, JOHN S. PEssENeER, a citizen of the United States, residing at Brooklyn, Kings county, New York, have invented new and useful Improvements in Ha chines for Bending the Eyes of Elliptic-Spring Plates, of which the following is a specification. My invention consists of improvements in mechanism for turning or bending the ends of IO elliptiespring plates to form the eyes for the end joints by which the two parts of elliptic springs are connected together or the halfsprings are connected to their supports. The said mechanism consists of an adjustable bedpiece on which the plates are laid to be bent,

interchangeable mandrels around which the eyes are to be formed, and a hollow crank carrying an adjustable bending device or wiper for bending the eyes, and receiving and hold ing theinterchangeable mandrels around which the eyes are bent, together with a clamp device for holding the plates, all as hereinafter fully described, reference being made to the accompanying drawings, in which Figure 1 is a sectional elevation of my improved eye-former for elliptic springs. Fig. 2 is partly a plan view and partly a horizontal section Fig. 3 is a detail illustrative of the operation of the machine, and Fig. 4 is a detail of the bed-plate and table in side elevation.

On any suitable bed-frame or table, a, provided with suitable grooved ways, Z), I arrange the bed-piece c on which to place the plate (I to have the eye 6 turned or bent over 011 the 3 5 end, said bed-piece being adjustable along the ways or guides b, and provided with a setscrew, f, or other means to secure it in position, and at the operative end it is curved at g, to correspond with the curvature of the exterior of the eye to be formed, or substantially It represents the mandrel around which the eye is to be turned; 1', the bending or wiping die for forming or bending the eye, and j the crank for supporting the mandrel and carrying the wiping-die. The crank is formed in ashaft, lot, which is arranged in bearings k at right angles to the bed-piece 0, the part at of said shaft being bored for the largest size of mandrels to be used, and the part Z having a socketbore, at, equal in size to the smallest mandrel to be used. All the mandrels are fitted to the tween the shoulders of the crank as in the part m of the shaft; but for smaller eyes the mandrels are reduced between the shoulders of the crank correspondingly, as indicated by the dot ted lines in Fig. 2. Generally two sizes will be used, one for the large eye, Fig. 1, WlllGll encircles the small eye, and the other for the small eye, Fig. 3, which is inclosed by the large one. 1

The wiper-die t consists of a flat plate arranged in a slot, 1),- of the crank, with one of its sides radial to the axis of the crank, or thereabout, said die being adjustable forward and backward radially, and set-screws q or other devices being provided to fasten it. The crank-shaft has a hand-wheel, r, for turning it to bend the eyes, the plates being inserted obliquely between the mandrel h and the curved part 9 of the bed-piece, as shown in Fig. 3, the wiper i being then swung down under the man 7 5 drel against the end of bed-piece c, as shown in Figs. 1 and 3, so that the end of the plate to be bent passes over and between it and the mandrel. Theplate is then pressed or struck down flat on the'bed-piece c, to form the beginning of the curve of the eye, and then the wipcrt is turned upward a half a turn, (more or less,) bending the plate around the mandrel, and thus forming the eye, as shown. The large eye is not bent around the whole circle, because the gap must be left at s for the plate having the small eye to be inserted in the large one; but the small eye may be turned completely around.

Sometimes springs are made with half-eyes 9o of the same size in each plate to meet and butt together at the side of the conneetingbolt 111 the longitudinalaxis of the spring, which eyes may also be formed with the same machine.

By reference to Figs. 1 and 3 it will be seen that the upper face of bed-piece c on which the plates rest when having the eyes formed lacks half the thickness of the spring-plate of being in the plane of the axis of the mandrel, the object of which is to have the plate exactly radial to the axis of the eye, which is practically better than to be tangential thereto. It will also be seen that the end of the bed-piece terminates short of the axial plane of the mandrel, which is at right angles to the plane of said bed-piece about as much as the thickness of the wiper, and the wiper is located against the end of the bed-piece, and consequently on the'same 1 side of saidplane, which is the best arrangement, particularly for the greater facility it affords of entering the plates to be bent; but the wiper will serve well if located radially to the eye, thebed-piecc being made correspondingly I claim, and desire to secure by Letters Patent,

1. The combination of the bed-piece 0, mandrel h, wiper i, and the hollow crank-shaft j Z W, said shaft carrying the wiper and holding the mandrel, substantially as described.

2. The hollow crank-shaft, having the wiper attached substantially as described, in combination with a mandrel located in the bore of the shaft, substantially as set forth.

3. The combination of interchangable mandrels with the crank-shaft having wiper i attached, and being bored through the partm and in the part I for said mandrels, substantially as described.

4. The combination of bed-piece 0. having curved end 9, and being adjustable toward and from mandrel h, with said mandrel and with wiper i, substantially as described:

5. The combination of clamp 0, journaled on shaft Mn, and having handle 1), with bed 0,

mandrel h, and wiper i, substantially as de- 0 scribed.

- JOHN s. PESSENGER.

\Vitnesses: d

W. J. MORGAN, S. H. MORGAN. 

